D and F Block Elements Test

Result

D and F Block Elements Test - 40

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Weekly Quiz Competition

Question 1
4 / -1

The radius of La³⁺(At. No of La = 57) is 1.06Å given values will be closest to the radius of Lu³⁺ (At. No. of Lu = 71)? A which one of the following

A
1.40Å

B
1.06Å

C
0.85Å

D
1.60Å
Question 2
4 / -1

The atomic numbers of V, Cr, Mn and Fe are respectively 23, 24, 25 and 26. which one of these may be expected to have the highest second ionization enthalpy ?

A
Cr

B
Mn

C
Fe

D
V
Question 3
4 / -1

When MnO₂ is fused with KOH, a coloured compound is formed. The product and its colour is

A
K₂MnO₄, purple green

B
KMnO₄ purple

C
Mn₂O₃, brown

D
Mn₂O₄ black
Question 4
4 / -1

The colourless species is

A
VCl₃

B
VOSO₄

C
Na₃VO₄

D
[V(H₂O)₆SO₄].H₂O
Question 5
4 / -1

A

B

C

D

Solution
Question 6
4 / -1

Equivalent weight of K₂Cr₂O₇ in acidic medium is

A
M

B
M/2

C
M/6

D
M/5

Solution
Question 7
4 / -1

The correct order of ionic radii of Y³⁺ , La³⁺, Eu³⁺+ and Lu³⁺ is

A
Y³⁺ < La³⁺ < Eu³⁺ < Lu³⁺

B
Y³⁺ Lu³⁺ < Eu³⁺La³⁺

C
Lu³⁺ < Eu³⁺ < La³⁺ < Y³⁺

D
La³⁺ < Eu³⁺ < Lu³⁺ < Y³⁺
Question 8
4 / -1

Iodide of Millon’s base is

A
HgI₂

B
K₂HgI₄

C
NH₂HgO.HgI

D
NH₄I
Question 9
4 / -1

Vanadyl ion is

A

B

C

D
Question 10
4 / -1

Monel metal is an alloy of

A
Cu + Zn + Ni

B
Cu + Ni + Fe

C
Cu + Sn + Pb

D
Cu + Ni + Al